Umbrella



3 1955 J. E. CLEMENS 2,707,476

UMBRELLA Filed May 6, 1954 2 Sheets-Sheet l INVENTOR 12 Jaw E. 62:44am H1 H M ATTORNEY May 3, 1955 J. E. CLEMENS UMBRELLA 2 Sheets-Sheet 2 Filed May 6. 1954 INVENTOR Jamv E. ZM-s ATTORNEY United States Patent UMBRELLA John E. Clemens, Cedar Rapids, Iowa Application May 6, 1954, Serial No. 427,918

2 Claims. (Cl. 135-20) This invention relates in general to umbrellas and in particular to an ofiset umbrella which has legs of different lengths and which may be independently adjusted.

It is oftentimes desirable when working on a tractor to have a shade over the drivers head to protect him from the hot sun. Conventional umbrellas are unsuitable for this purpose because the center supporting pole interferes with the driver and only about one third of the umbrella is used effectively. Certain offset umbrellas have been developed which have certain legs that vary in length as the umbrella is opened or closed, however, these umbrellas would have to be removed each time they were opened or closed and this would be time consuming.

It is an object of this invention, therefore, to provide an offcenter umbrella wherein the length of the legs may be varied independently.

Another object of this invention is to provide an umbrella which may be opened or closed while mounted on a vehicle.

Yet another object is to provide a simple offset umbrella that may be cheaply and easily constructed.

A feature of this invention is found in the provision for an off-center umbrella in which the extensible legs may be adjusted independently of the opening and closing mechanism.

Further features, objects and advantages of this invention will become apparent from the following description and claims when read in view of the drawings, in which:

Figure l is a top view of my umbrella with a portion of the canvas removed.

Figure 2 is a side view of the umbrella.

Figure 3 is a side view of the umbrella in the collapsed position.

Figure 4 is a detail view of the telescoping locking device.

Figure 5 is a top view of the slide bracket; and

Figure 6 is a side view of the slide bracket.

Figure 2 illustrates a main supporting pole 10 which may be supported by its lower end 14 in a suitable holding bracket 11. A plurality of openings 12 are formed in the bracket 11 and bolts 13 or other holding means may be used to attach it to the pole 10 and to a vehicle or other structure upon which it is desired to mount the umbrella.

A ferrule 16 is firmly attached to the top of pole 10 and has a group of four pivot brackets 17, 18, 19, and attached thereto. The pivot brackets pivotally support arms of the umbrella 21, 22, 23 and 24. The arms may be formed from hollow tubing and a pair of telescoping extensions 26 and 27 are mounted in arms 22 and 23 and may be locked in any desired position by the locking means 28 and 29.

A sleeve 31 is slidably mounted on the pole 10 below the ferrule 16. It has a threaded portion 33 that receives a set screw 32 therethrough to lock the sleeve in any desired position on the pole 10.

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As best shown in Figures 5 and 6 sleeve 31 has four pivot brackets 34, 35, 36 and 37 attached to the top thereof which pivotally support the braces 38, 39, 40 and 41. The opposite ends of the braces are pivotally attachedto the brackets shown in Figures 1 and 2 that are mounted on legs 21, 22, 23 and 24. The braces 38, 39, 40 and 41 are attached to brackets 34, 35, 36 and 37 by pins 42.

A canvas cover 43 is mounted over the umbrella frame as shown in Figures 1 and 2.

A detail of locking means 28 and 29 appears in Figure 4. The ends of legs or arms 22 and 23 are beveled as shown by numeral 55. A first plate 46 is attached to leg or arm 22 and a bolt 47 extends therethrough as shown. One end of bolt 47 is threaded and is designated as 48. A first nut 49 is received on the bolt on one side of the plate 46 and a second nut 51 is received on the other side of plate 46 to firmly lock the bolt in place.

A locking plate 53 is formed with two openings 54 and 57 and the extension 26 is received through opening 54 and the bolt 47 is received through opening 57. Opening 57 is loose with bolt 47 so that cocking action may be obtained to lock extension 26 in any desired position relative to leg 22. A spring 56 is received over bolt 47 between plate 53 and the head 52 of the bolt.

It is to be realized that the locking means 28 and 29 are the same and serve the function of making it possible to lock the extensions 26 and 27 in any position relative to arms 22 and 23.

I In operation, the umbrella of this invention may be mounted on a tractor or other device. The advantages of my invention are that it may be mounted permanently on a tractor and may be opened or retracted without removing from the holding bracket. This is true because the extensions 26 and 27 may be retained in the extended or retracted positions as the umbrella is opened or closed.

To open the umbrella, the set screw 32 is loosened and sleeve 31 is pushed up pole 31 thus causing the braces 38, 39, 40 and 41 to push the arms out from the pole. When the arms are raised completely, the set screw 32 may be tightened and locked in place. Then the extensions 26 and 27 may be extended by loosening the locking means 28 and 29. The locking means may be released by moving plate 53 away from plate 46.

If the umbrella is mounted on a tractor the drivers head can remain under the umbrella near the center and the pole will not interfere or bump his head.

It is to be noted that the arms do not have the same lengths in that arms 21 and 24 are somewhat longer than arms 22 and 23. However, the extensions 26 and 27 within arms 22 and 23 make it possible for their combined lengths to be greater than that of legs 21 and 24. The angle between arms 22 and 23 might be 65 degrees and the angle between arms 21 and 24 might be 135 degrees. This requires that the angles between arms 21 and 22, and arms 23 and 24 be degrees, respectively.

The pole 10 may be mounted from about to of the overall length behind the center line. As shown in Figure 1 it is mounted about one-fourth the distance across the umbrella.

It is seen that this umbrella has many features that make it unique. Although it has been described with respect to a preferred embodiment, it is not to be so limited as changes and modifications may be made which are within the full intended scope as defined by the appended claims.

I claim:

1. An umbrella comprising, a pole, four arms pivotally attached to the pole at the top thereof, said arms mounted asymmetrical about the pole, a first pair of arms separated by an angle less than ninety degrees, a pair of extensions attached to. the. first pair of. arms and movable from a first retracted position to a second extended position independent of the position of the arms relative to the: pole, lockingmeans for locking, said extensions. in the first or second: positions, and a canvas cover attachedto the arms and extensions.

2. In apparatusaccording to claim 1 wherein saidlocking means comprises, a first plate mounted on the end of an arm, a second plate loosely mounted on an extension, a bolt extending through said first and seconds plates and firmly attached to the first plate, and loosely connected to the second plate, a spring biasing said plates apart,. and. the end of the. arm beveled so. that the second plate may cock to lock the extension.

References Cited in the file of this patent UNITED STATES PATENTS 1,208,097 Collins et al. Dec. 12, 1916 2,493,121 Ellis Jan. 3, 1950 FOREIGN PATENTS 170,930 Great Britain, Oct. 31, 1921 

